Hot water urn



Aug. 10, 1937. I s c 2,089,303

' HOT WATER URN Filed April '7, 1937 ATTORN EY Patented Aug. 10, 1937 -UNlTED STATES PATENT OFFICE HOT WATER. URN v Ralph Sica, Philadelphia, Pa., assignor to Horn and Hal-dart Baking Company, Philadelphia, Pa., a corporation of New Jersey Application April 7, 1937, Serial No. 135,397

3 Claims. .(Cl. mile-231) In the art of making coffee in hotels and restaurants, it is customary to use a battery of urns consisting of a hot water um and one or more coffee urns. When coffee is to be made it is 5 placed in a coffee um and the very hot, or boiling water is drawn from the hot water um and poured into the coffee urn.

If the water in the hot water urn is not hot but cool or'cold, it is possible in the prior art 10 constructions for a careless attendant to draw water which is not heatedto the proper degree from the hot water um and if this is placed in a coffee urn, inferior cofiee is produced.

The primary object of this invention is to so construct the hot water urn that an attendant can not withdraw water from it which is not heated to the proper degree for the making of cofiee.

'With the above and other objects in view,

which will hereinafter clearly appear, my invention comprehends a novel hot waterurn.

It further comprehends a novel hot water urn, wherein the withdrawal of water from it is con- .trolled by a novel construction and arrangement 25 ,of a siphon provided with vacuum breaking means which prevents the operation of the siphon if the water is not heated to the proper degree for the making of satisfactory cofiee.

Other novel features of construction and ad- 30 vantage will hereinafter more clearly appear in r the detailed description and the appended claims.

For the purpose of illustrating the invention,

I have shown in the accompanying drawing a typical embodiment of it, which, in practice, will 35 give satisfactory and reliable results. It is, however, to be understood that the various instrumentalities of which my invention consists can be variously arranged and organizedand my invention is not limited to the exact arrangement and organization of these instrumentalities as herein set forth.

Figure l is a front elevation of a hot water urn embodying my invention.

Figure 2 is a sectional elevation. Figure 3 is a detail on an enlarged scale of the siphon. v

Figure 4 is a sectional detail showing more particularly the steam coil for heating the water. Figure 5 is a section on line 55 of Figure 2. 50 Figure 6 is a top plan view, partly broken away of thesiphon.

Similar numerals indicate corresponding parts. Referring to the drawing: I designates the outer shell of a hot water um 55 embodying my invention. 2 is the water jacket,

and the water is heated by a steam coil 3 in the conventional manner. A cover 4 is provided with a safety valve 5.

The urn is provided with a water gauge 6 and a valve controlled water connection 5 The siphon is provided with legs 8 within the water jacket and these legs are opened at their lower ends and terminate a desired distance above the bottom of the water jacket. The legs 8 at their upper ends communicate with a vac- 10 uum chamber 9 in a casing Ill having an opening H in its top wall which serves as a vacuum breaker.

The casing III is supported by a pipe l2 communicating with the vacuum chamber 9 and leading through the side wall of the urn to a draw-off faucet l3. ll designates the space above the hot water. 7

The operation will now be apparent to those skilled in this art and is as follows:

Assuming that the water in the urn is heated to the desired degree and the attendant desires to draw oii hot water for making coffee in a coffee urn, he opens the draw-oil? faucet I3. The pressure on the hot water in the space II will cause the hot water to flow through the siphon legs 8, vacuum chamber and pipe I? to the drawofi faucet.

If the water is not hot, the opening II will cause the vacuum to be broken in the vacuum chamber 9 and water will not flow from the urn to the draw-off faucet.

The opening II which causes the vacuum to be broken in vacuum chamber 9 is small compared to the discharge opening of the faucet i3. When the water. is heated to obtain a certain amount of pressure in the device the opening of the faucet l3 relieves the pressure built up by steam passing through the opening ll faster than it can built up, accordingly the pressure in chamber 9 is less than in boiler 2. The pressure in boiler 2 then forces water up the! tubes 8 into the chamber 8 from whence it flows to the faucet l3. When the water is cold, or

when the pressure is not great enough to force the water into chamber 9, no water is discharged. At these times opening ll serves to prevent a syphoning action of the water due to the presence of a certain amount of water left in the pipe I! from the previous drawing. 5 It will thus be apparent that the attendant cannot obtain coldwater from the hot water urn but only hot water heated to the proper 'degree for making coffee chastandard excellence.

A hotel or restaurant is enabled with this invention to maintain a standard of excellence at all times for their cofiee, since coffee 0! a standard grade is used, and the water must be properly heated in the hot water urn before it can be transferred to the coffee urn.

Having thus described my invention, what I claim as new and desireto secure by letters Patent is:-

1. In a hot water urn, a water tank, a drawofl faucet, and a siphon within the tank leading to said draw-ofi faucet and having a vacuum chamber provided with vacuum breaking means of less area than that of the discharge opening of the faucet and effective when the heat of the water is below a predetermined temperature.

,2. In a hot water'urn, a water tank, a drawoff faucet, a siphon having a leg-extending into the water and open at its lower end, and having a vacuum chamber with which the upper and water is cold.

of said leg communicates, said chamber having an opening therein smaller than the discharge opening of the faucet and serving to break the vacuum when the pressure above the water drops to a predetermined degree. and thereby preventing withdrawal of water from the tank when the 

